Adam Clarke on 2 Timothy 3:4

Traitors - Προδοται· From προ, before, and διδωμι, to deliver up. Those who deliver up to an enemy the person who has put his life in their hands; such as the Scots of 1648, who delivered up into the hands of his enemies their unfortunate countryman and king, Charles the First; a stain which no lapse of ages can wipe out.

Heady - Προπετεις· From προ, forwards, and πιπτω, to fall; headstrong, precipitate, rash, inconsiderate.

High-minded - Τετυφωμενοι· From τυφος, smoke; the frivolously aspiring; those who are full of themselves, and empty of all good.

Lovers of pleasures more than lovers of God - This is nervously and beautifully expressed in the Greek, φιληδονοι μαλλον η φιλοθεοι lovers of pleasure rather than lovers of God; i.e. pleasure, sensual gratification, is their god; and this they love and serve; God they do not.